Re: [Supertuxkart-devel] My joystick experience

[Nathan O. <geo...@ho...>]

Not sure if this is an option, but could we make a calibration dialog that let the user move all of the axis as far as they could go in each direction and store the values as the min and max? Just a thought cuz I'm having trouble with one of mine too. I have a slider on one of my gamepads that would cause trouble for some games unless it was in the middle - even though I never used it.

- George

> Date: Fri, 5 Mar 2010 13:13:15 +1100
> From: jo...@lu...
> To: sup...@li...
> Subject: Re: [Supertuxkart-devel] My joystick experience
> 
> Hi,
> 
> now I begin to understand (I might have missed a thing or two in your
> previous email, sorry).
> > The original problem was that input sensing was not working at all.
> > 
> > As I said my third axis always has a value of -32767, so because of it
> > right at the beginning of inputSensing, abs(value) > m_max_sensed_input
> > blocks the inputs because it registers 32767 as the max all the time,
> > so first I needed to block my 'virtual axis': axis_id > 1.
> That's probably hard to do in STK :(  One option we might consider: use
> only analogue sticks that give at least two different values? Would that
> work (gee, see below)?
> 
> ...
> > - For the axis in digital mode:
> > The first input gets registered at m_sensed_input_on_all_axes;
> > The second gets blocked at the first abs(value) > m_max_sensed_input;
> > Because the second won't ever be bigger than the first, because the
> > first was the maximum.
> > Note: The directional-pad is also axis here.
> Hmm - so my approach above wouldn't work here, right - since those are
> still stick axis, not buttons :( I thought that they would give a button
> event (which we can handle).
> 
> 
> > - For the axis in analog mode:
> > With the current revision (with the mod up) it works but I have to move
> > the stick very slowly, or else I will have to move more than 2 times to
> > map the axis, so I just keep moving until it reads.
> That is strange, too - you should get at least three or four reading ...
> unless something is very slow.
> 
> > Because of this I thought that the '2 tries checking' was not working
> > well, and it is hard to debug this since there is a lot of input values
> > passing. So I choose a simpler approach that was just registering the
> > input when it arrives at the 'maximum threshold'. That 3/4 was just a
> > random value, it could be bigger.
> Instead of using two values (which I am not sure where it is coming
> from), could we go back to the 0.6.2* way of testing for the selected
> axis to report 0? Or perhaps close to zero?
> 
> Wouldn't that solve all problems - except the first one of the axis
> always reporting 32767?
> 
> What about instead of storing the maximum, we would store the latest
> value equal to the maximum? E.g. even if the first event reports the
> -32767, we would get the same again for the actual axis and store this
> axis. When you then release the stick, it will go back to 0, and selected?
> 
> 
> 
> > By the way, my joystick is PS2-like so it has an 'analog mode' button.
> > In this controller I get analog and digital values through the same
> > axis, so it can't be the cause for strange coding ;). Also, remember
> I think that was what I remembered: you get two events for the same
> thing. But no idea, I never did much with the input handling.
> 
> > that I won't ever have 32768, only 32767 :)
> Understood - 327678
> 
> 
> Auria, I notived that there are two MAX_VALUEs: ine in input.hpp, one in
> options_screen_input.cpp (which appears not to be used).
> 
> Cheers,
>    Joerg
> 
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